Trouble Code:
P0432- Main Catalyst Efficiency Below Threshold (Bank 2)
P0432 Code Definition:
P0432 Code indicates that the Bank 2 Main Catalytic Converter’s emissions efficiency has fallen below the minimum allowable limit. This threshold is tracked by a Catalyst Monitoring Oxygen Sensor located on or near the outlet of the Catalytic Converter.
Symptoms:
- Check Engine Light will illuminate
- In many cases, no abnormal symptoms may be noticed
Possible Cause:
- Defective Catalytic Converter
- Engine misfires have damaged the Catalytic Converter
- Internal engine damage resulting in high oil consumption and/or a leaking Head Gasket has damaged the Catalytic Converter
Possible Misdiagnoses:
- Oxygen Sensor(s) are replaced when the real problem is a damaged Catalyst
- Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
- Catalyst is replaced when a misfiring engine is the real problem